MAX27(通用的GPS接收器)_datasheet.pdfVIP

General Description The MAX2769 is the industry’s first global navigation satellite system (GNSS) receiver covering GPS, GLONASS, and Galileo navigation satellite systems on a single chip. This single-conversion, low-IF GNSS receiver is designed to provide high performance for a wide range of consumer applications, including mobile handsets. Designed on Maxim’s advanced, low-power SiGe BiCMOS process technology, the MAX2769 offers the highest performance and integration at a low cost. Incorporated on the chip is the complete receiver chain, including a dual-input LNA and mixer, followed by the image-rejected filter, PGA, VCO, fractional-N frequency synthesizer, crystal oscillator, and a multibit ADC. The total cascaded noise figure of this receiver is as low as 1.4dB. The MAX2769 completely eliminates the need for external IF filters by implementing on-chip monolithic filters and requires only a few external components to form a com- plete low-cost GPS receiver solution. The MAX2769 is the most flexible receiver on the market. The integrated delta-sigma fractional-N frequency synthesizer allows programming of the IF frequency within a ±40Hz accuracy while operating with any refer- ence or crystal frequencies that are available in the host system. The integrated ADC outputs 1 or 2 quan- tized bits for both I and Q channels, or up to 3 quan- tized bits for the I channel. Output data is available either at the CMOS logic or at the limited differential logic levels. The MAX2769 is packaged in a compact 5mm x 5mm, 28-pin thin QFN package with an exposed paddle. The part is also available in die form. Contact the factory for further information. Applications Location-Enabled Mobile Handsets PNDs (Personal Navigation Devices) PMPs (Personal Media Players) PDAs (Personal Digital Assistants) In-Vehicle Navigation Systems Telematics (Asset Tracking, Inventory Management) Recreational/Marine Navigation/Avionics Software GPS Laptops and Ultra-Mobile PCs Digital Still Cameras an